Comment 2 for bug 1254288

The fix is trivial: just download a recent version of ez_setup.py
But this does not solve the issue because there's a dependency on package "bzr" which will not be met.

>> Unfortunately, "bzr" is not ported to Python3 yet. <<

As far as I know, Canonical has little interest on porting bzr to Python3.
As far as I know, Mercurial suffers from the same lack of support for Python3.

So, the only option I see is abandoning Bazaar and Mercurial whatsoever and adopting Git. :(